dcjsc

import java.io.PrintStream;
import java.util.Scanner;


public class test {


    public static Scanner in = new Scanner(System.in);
    public static PrintStream out = System.out;

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt(), m = in.nextInt();
        for (int i = 0; i < n; i++) {
            if (i % 2 == 0) {
                for (int j = 0; j < m; j++) {

                    System.out.print(m * i + j + 1 + " ");
                }
            } else {
                for (int j = m - 1; j >= 0; j--) {
                    System.out.print(m * i + j + 1 + " ");
                }
            }
            out.println();
        }
    }
}